Electrics (last minute check up for test tommorrow)

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SUMMARY

This discussion focuses on the concepts of power and energy transfer in electricity, specifically addressing the relationships between current, voltage, resistance, and their calculations. The user seeks clarification on how to derive power from energy output and time, as well as the implications of energy transfer. Key formulas mentioned include the relationship between power (P), work (W), and time (t), specifically P = dW/dt and W = ∫ Power dt.

PREREQUISITES
  • Understanding of Ohm's Law (V = IR)
  • Familiarity with electrical units: volts, amperes, and ohms
  • Basic calculus concepts, particularly integration
  • Knowledge of energy transfer principles in electrical systems
NEXT STEPS
  • Study the relationship between power, energy, and time in electrical circuits
  • Learn about the concept of energy transfer in electrical systems
  • Explore advanced topics in electrical engineering, such as circuit analysis
  • Review calculus applications in physics, focusing on integration techniques
USEFUL FOR

Students preparing for exams in physics or electrical engineering, educators seeking to clarify concepts of power and energy transfer, and anyone looking to strengthen their understanding of basic electrical principles.

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Electrics -Power, energy transfer- (last minute check up for test tomorrow)

(Long time lurker, first time poster here. Hi all)

I've learned about current, coloumb (sp?) resistance, voltage and so on. I know that resistance is V/I, how to caltulate colombs but I get really confused when it comes to energy transfer and power.

I know the formula, but I don't understand it at all. Can you work out the power from just the energy output and time taken? What does it mean by energy transfer? Can you work that out from the current, time and power?

And also, I'd like any other help/advice concernig electricity as well.

*Any* help would really, really appreciated, since this text is going to decide on my grade for the term. And I'm on fail level right now thanks to a crappy teacher.
 
Last edited:
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I guess if W is the work then that is the Energy,
and Power is really is synonym for dW/dt = P the power.

So that is that.

By the way W = Integral_over_time[Power] !
 

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